1. The inlay: Whilst the needle is withdrawn into its trick during knock-over of the previous warp overlap, the weft inlay tube is lowered. As it traverses in an underlap shog, the weft is laid below the level of the needle and on top of the warp thread that extends from its head to the warp guide.

2. Clearing the warp overlap: The weft tube rises slightly on completion of its traverse movement to allow the needle to move out of its trick to clear its old warp overlap.

3. The warp overlap wrap: The warp guide rises between the needles and automatically overlaps from the left, lowering itself again on the right side of its needle.

4. Warp knock-over and underlap: The needlenow retires into its trick to knockover the old overlap, whilst the warp guide is cammed under its needle to the start position for its next overlap, thus completing the closed lap pillar. NB:The closed lap is used for the carbine needle but the alternating overlap of the open lap pillar stitch used with the conventional latch and bearded needles gives a more balanced loop structure. Tricot lapping with two guide bars produces a secure fabric which does not unrove.

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Mazharul Islam Kiron is a textile consultant and researcher on online business promotion. He is working with one European textile machinery company as a country agent. He is also a contributor of Wikipedia.